Hyundai Santa Fe: Air conditioning System / A/C Pressure Transducer. Repair procedures

Hyundai Santa Fe (TM) 2019-2025 Service Manual / Heating,Ventilation And Air Conditioning / Air conditioning System / A/C Pressure Transducer. Repair procedures

Inspection

•	Before measuring the pressure of the refriferant line, check whether the refrigerant amount is charged in accordance with the specified charging amount. (Refer to Heating, Ventilation, Air Conditioning - "Specifications")

1.	Turn the ignition switch OFF.

2.	Install the refrigerant recovery/recycling/charging system. (Refer to Air Conditioning System - "Repair procedures")

3.	Turn ON the ignition switch, put into operation the air conditioner.

Calculate the reference voltage of the Recovery/Recycle/Recharge machine high pressure value using the formula below.

Reference voltage (V) = 0.0088 * pressure(psi) + 0.37

Measure the sensor output voltage between terminal "1" and "2".

Pin No	Function
1	Ground
2	Voltage
3	Power (+5V)

6.	If the reference voltage value and the sensor output voltage value are close to each other, the air conditioner pressure transducer is normal.

If 0V is output or the reference voltage value and sensor output voltage value are not close to each other, replace the air conditioner pressure transducer.

•	Check if the output voltage changes when the high pressure value of the refrigerant line changes.

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Recover the refrigerant with a recovery/charging station.

3.	Disconnect the A/C pressure transducer connector (A).

Remove the A/C pressure transducer (A).

Tightening torque :

10 - 12 N.m (1.02 - 1.22 kgf.m, 7.4 - 8.8 lb-ft)

•	Be careful not to bend the liquid & suction pipe.

Install in the reverse order of removal.

•	When installing, replace it with a new O-ring (A).

A/C Pressure Transducer. Description and operation

Description The A/C Pressure Transducer (APT) converts the pressure value of high pressure line into voltage value after measuring it...

Evaporator Temperature Sensor. Description and operation

Description The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling...

Other information:

Hyundai Santa Fe (TM) 2019-2025 Service Manual: Special service tools

Hyundai Santa Fe (TM) 2019-2025 Service Manual: Troubleshooting

Fail-Safe Mode Item Fail-Safe ETC Motor Throttle valve stuck at 5° TPS TPS 1 fault Replace it with TPS2 TPS 2 fault Replace it with TPS1 TPS 1, 2 fault Throttle valve stuck at 5° APS TPS 1 fault Replace it with TPS2 TPS 2 fault Replace it with TPS1 TPS 1, 2 fault Throttle valve stuck at 5° • When throttle value is stuck at 5°, engine speed is limited at below 1,500rpm and vehicle speed at maximum 40 - 50 km/h (25 - 31 mph)...